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An Image Analysis Approach to the 3D Position Measurement of Riser End

机译：提升端3D位置测量的图像分析方法

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摘要

Re- entry operation is requested to make the connection of the riser end with the bottom platform (BOP). In re-entry operation, the relative position between the riser end and the bottom platform should be measured. To facilitate re- entry operation, the paper presents an image analysis approach that is convenient to measure the relative position between the riser end and the bottom platform with a single waving camera installed on a ROV. In the image analysis approach, and the targets of the riser end and the bottom platform are recognized from the obtained image by matching the shape models of targets, and the shape regions of targets are highlighted. In the shape regions, the position of riser end referred to the camera, and the orientation of camera referred to the bottom platform, are calculated from circle marks on the tabs attached on the riser end and the bottom platform. Also the relative position between the riser end and the bottom platform can be got thereby, not influenced by the orientation of the waving camera. To check the accuracy of the image analysis approach, the experiments were carried out, and the results are shown in the paper. To test the applicability of the approach to the riser end survey, the model experiments of re- entry operation in water tank were carried out also, and the successful results are shown in the paper.
机译：要求重新进入操作以将立管端与底部平台（BOP）连接起来。在重新进入操作中，应测量立管端与底部平台之间的相对位置。为了方便重新输入操作，本文提出了一种图像分析方法，该方法可方便地通过安装在ROV上的单个挥杆摄像机来测量立管端与底部平台之间的相对位置。在图像分析方法中，通过匹配目标的形状模型，从获得的图像中识别出立管末端和底部平台的目标，并突出显示目标的形状区域。在形状区域中，立管端相对于摄像头的位置以及摄像头相对于底部平台的方向是根据附在立管端和底部平台上的凸耳上的圆形标记计算的。由此也可以得到立管端与底部平台之间的相对位置，而不受挥舞的照相机的方位的影响。为了检查图像分析方法的准确性，进行了实验，结果显示在论文中。为了验证该方法在立管端部测量中的适用性，还进行了水箱再入操作的模型实验，并在本文中显示了成功的结果。

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